body {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: #f3f6f8;
}
body div.language {
  margin-bottom: 1rem;
  display: flex;
  gap: 3rem;
}
body div.language > span:hover {
  color: #87ceeb;
  text-decoration: underline;
  cursor: pointer;
}
body div.ani {
  transform: rotateY(180deg);
}
body div#app {
  box-shadow: 0 2px 12px #0000001a;
  transform-style: preserve-3d;
  transition: 2s;
  min-width: 50vw;
}
body div#app > div#content {
  display: flex;
  background: #fff;
  padding: 2rem;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}
body div#app > div#content > div#info {
  display: flex;
  flex-direction: column;
  align-items: center;
}
body div#app > div#content > div#info p.tip {
  color: gray;
}
body div#app > div#content > div.operations > button {
  box-sizing: border-box;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  line-height: 1;
  height: 32px;
  white-space: nowrap;
  cursor: pointer;
  margin: 0;
  transition: 0.1s;
  user-select: none;
  padding: 8px 15px;
  border-radius: 10px;
  font-size: 16px;
  color: #fff;
}
body div#app > div#content > div.operations > button.common {
  border: 0 solid #409eff;
  background: #409eff;
}
body div#app > div#content > div.operations > button.common:hover {
  border-color: #66b1ff;
  background: #66b1ff;
}
body div#app > div#content > div.operations > button.common:active {
  border-color: #3a8ee6;
  background: #3a8ee6;
}
body div#app > div#content > div.operations > button.oi {
  border: 0 solid #67c23a;
  background: #67c23a;
}
body div#app > div#content > div.operations > button.oi:hover {
  border-color: #85ce61;
  background: #85ce61;
}
body div#app > div#content > div.operations > button.oi:active {
  border-color: #5daf34;
  background: #5daf34;
}
body div#app span#count {
  color: red;
}
body div#app span#status {
  color: purple;
}
